function popupSteuerung(oncePerSession)
{
  var popurls          = new Array();
  var popurlsparam     = new Array();

  popurls[0]           = "/phpAds/adframe.php?what=popunder_default&clientID=3";
  popurlsparam[0]      = "width=300,height=250";
  
  index1 = Math.floor(Math.random()*(popurls.length));
  
  if ((oncePerSession == '1') && (get_cookie('slpopup')==''))
  {
    openPopup(popurls[index1],popurlsparam[index1]);  
    document.cookie="slpopup=yes";
  }
  else
  {
    openPopup(popurls[index1],popurlsparam[index1]);  
  }
}

function openPopup(popurl,popurlparam)
{
  var winpopup=window.open(popurl,"slpopup",popurlparam);
}

function get_cookie(Name) 
{
  var search = Name + "=";
  var returnvalue = "";
  if (document.cookie.length > 0) 
  {
    offset = document.cookie.indexOf(search);
    if (offset != -1)
    { // if cookie exists
      offset += search.length;
      // set index of beginning of value
      end = document.cookie.indexOf(";", offset);
      // set index of end of cookie value
      if (end == -1)
      {
         end = document.cookie.length;
      }
      returnvalue=unescape(document.cookie.substring(offset, end));
    }
  }
  return returnvalue;
}